US PATENT SUBCLASS 209 / 295
.~.~.~.~.~ Pneumatic


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



209 /   HD   CLASSIFYING, SEPARATING, AND ASSORTING SOLIDS

233  DF  SIFTING {16}
*  DD  .~ Drum sifters {2}
*  DD  .~.~ Horizontal and inclined {4}
288  DF  .~.~.~ Rotating {3}
293  DF  .~.~.~.~ With agitators and conveyors {3}
295.~.~.~.~.~ Pneumatic


DEFINITION

Classification: 209/295

(under subclass 293) Rotating cylindrical or drum sifters on horizontal or inclined axes provided with means for agitating the material by gaseous-fluid currents as the major agitating factor.

(1) Note. This subclass will include cases where the sole agitating means may be the air-supplying means, but will also include cases which employ mechanical stirring or conveying means within the sifter, provided the air-supplying means is a major factor and not merely an incident to the use of such mechanical devices or a minor factor. In the latter case the classification is determined by the type of mechanical agitator.